I have a US issued M&M Barclaycard which should stop my miles from ever expiring, however this week I received an email that a good junk of my mileage balance will expire on 3/31. For personal reasons I haven't been able to use the card between Oct-mid Jan which left me with 3 billing cycles without a charge. I've already emailed M&M about this but haven't heard back in 2 weeks but my main question is, if I start charging for the next 2 billing cycles before 3/31 will I be able to keep the miles from expiring again or does that not make a difference to them?
Thanks